Energy Flow
Water
Carbon
Cycles
Populations
100

Organisms that obtain energy by eating other organisms in their ecosystem are called:

Consumers / Heterotrophs

100

What is the process of rain or snowfall called? 

precipitation 

100
In what process do plants remove carbon dioxide from the air?
photosynthesis
100

Why must nitrogen be "fixed" ?

the N2 gas in the air is not in a form that is usable by plants

100

What is a population?

A group of individuals that belong to the SAME species, living in a given area at the same time.

200

________ are animals that eat the carcasses of dead animals.

Scavengers

200

What is the process of turning a liquid into a gas? 

Evaporation

200

What are the 4 elements make up 96% of mass of most living organism?

oxygen, carbon, hydrogen, nitrogen

200

How does nitrogen fixation occur?

nitrogen-fixing bacteria

200

Under ideal conditions with ______ resources, a population will grow exponentially.

Unlimited

300

Explain the difference between a food web and a food chain? 

A food chain is a series of organisms in which energy is transferred from one trophic level to another. (Simple, one directional)

A food web consist of many interconnected food chains at many trophic levels. (More complicated and realistic) 

300

What is transpiration?

the evaporation of water from plants

300
How do carbon molecules enter the soil?
decomposition
300
What is the other name for nutrient cycles?
Biogeochemical cycles
300

When a population has unlimited resources, it rises slowly at first and then rapidly rises faster and faster, creating a J-shaped curve. This is known as _________ growth.

Exponential

400

Name 3 types of consumers

Herbivores, Omnivores, Carnivores and Decomposers

400

What two things can happen with water after precipitation has returned it to the ground?

Percolation and Surface Runoff 

400
In what process do animals return carbon to the atmosphere?
respiration
400

T or F : Photosynthesis is a step in the global nitrogen cycle

False

400

When a populations growth slows and then stops, following a period of exponential growth, creating an S-shaped curve. This is know as _______ growth.

Logistic

500

Which level of an energy pyramid has the most energy available (biomass)?

Producers

500

How much of the earth's surface is covered in water?

A. 30%

B. 10%

C. 70%

D. 50%

C. 70%

500

When a forest fire happens in the forest where does all the carbon go?

A. Into the atmosphere

B. Into the soil

C. It is destroyed 

D. The fire eats it for fuel

A. Into the atmosphere

500

All organisms require nitrogen to make amino acids, which combine to form proteins, and nucleic acids such as _ _ _ and _ _ _.

DNA and RNA

500

Once an environment has reached the maximum number of individuals it can support, the population then stabilizes at _______  _______ .

Carrying Capacity

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